Five hours later, SWAT officers made their move on the building, and found the victims inside.

The victims were identified as Loretta Purcell, 84, and Christopher Kelly Purcell, 58, who lived in the same block where they were found dead, according to the Cook County medical examiner's office.

Christopher's brothers tell WGN News their brother shot and killed their mother before turning the gun on himself. They say Christopher Purcell had a long history of mental illness as well as drug and alcohol abuse. They say their mother tried to get him help and help him herself but to no avail.